1 /* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #if 0 23 #define PLUGIN_DEBUG 24 #endif 25 #if 0 26 #define OSS_DEBUG 27 #endif 28 29 #include <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/time.h> 32 #include <linux/vmalloc.h> 33 #include <linux/moduleparam.h> 34 #include <linux/string.h> 35 #include <sound/core.h> 36 #include <sound/minors.h> 37 #include <sound/pcm.h> 38 #include <sound/pcm_params.h> 39 #include "pcm_plugin.h" 40 #include <sound/info.h> 41 #include <linux/soundcard.h> 42 #include <sound/initval.h> 43 44 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 45 46 static int dsp_map[SNDRV_CARDS]; 47 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 48 static int nonblock_open = 1; 49 50 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 51 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 52 MODULE_LICENSE("GPL"); 53 module_param_array(dsp_map, int, NULL, 0444); 54 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 55 module_param_array(adsp_map, int, NULL, 0444); 56 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 57 module_param(nonblock_open, bool, 0644); 58 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 59 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 61 62 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg); 63 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 64 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 65 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 66 67 static inline mm_segment_t snd_enter_user(void) 68 { 69 mm_segment_t fs = get_fs(); 70 set_fs(get_ds()); 71 return fs; 72 } 73 74 static inline void snd_leave_user(mm_segment_t fs) 75 { 76 set_fs(fs); 77 } 78 79 /* 80 * helper functions to process hw_params 81 */ 82 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 83 { 84 int changed = 0; 85 if (i->min < min) { 86 i->min = min; 87 i->openmin = openmin; 88 changed = 1; 89 } else if (i->min == min && !i->openmin && openmin) { 90 i->openmin = 1; 91 changed = 1; 92 } 93 if (i->integer) { 94 if (i->openmin) { 95 i->min++; 96 i->openmin = 0; 97 } 98 } 99 if (snd_interval_checkempty(i)) { 100 snd_interval_none(i); 101 return -EINVAL; 102 } 103 return changed; 104 } 105 106 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 107 { 108 int changed = 0; 109 if (i->max > max) { 110 i->max = max; 111 i->openmax = openmax; 112 changed = 1; 113 } else if (i->max == max && !i->openmax && openmax) { 114 i->openmax = 1; 115 changed = 1; 116 } 117 if (i->integer) { 118 if (i->openmax) { 119 i->max--; 120 i->openmax = 0; 121 } 122 } 123 if (snd_interval_checkempty(i)) { 124 snd_interval_none(i); 125 return -EINVAL; 126 } 127 return changed; 128 } 129 130 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 131 { 132 struct snd_interval t; 133 t.empty = 0; 134 t.min = t.max = val; 135 t.openmin = t.openmax = 0; 136 t.integer = 1; 137 return snd_interval_refine(i, &t); 138 } 139 140 /** 141 * snd_pcm_hw_param_value_min 142 * @params: the hw_params instance 143 * @var: parameter to retrieve 144 * @dir: pointer to the direction (-1,0,1) or NULL 145 * 146 * Return the minimum value for field PAR. 147 */ 148 static unsigned int 149 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 150 snd_pcm_hw_param_t var, int *dir) 151 { 152 if (hw_is_mask(var)) { 153 if (dir) 154 *dir = 0; 155 return snd_mask_min(hw_param_mask_c(params, var)); 156 } 157 if (hw_is_interval(var)) { 158 const struct snd_interval *i = hw_param_interval_c(params, var); 159 if (dir) 160 *dir = i->openmin; 161 return snd_interval_min(i); 162 } 163 return -EINVAL; 164 } 165 166 /** 167 * snd_pcm_hw_param_value_max 168 * @params: the hw_params instance 169 * @var: parameter to retrieve 170 * @dir: pointer to the direction (-1,0,1) or NULL 171 * 172 * Return the maximum value for field PAR. 173 */ 174 static unsigned int 175 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 176 snd_pcm_hw_param_t var, int *dir) 177 { 178 if (hw_is_mask(var)) { 179 if (dir) 180 *dir = 0; 181 return snd_mask_max(hw_param_mask_c(params, var)); 182 } 183 if (hw_is_interval(var)) { 184 const struct snd_interval *i = hw_param_interval_c(params, var); 185 if (dir) 186 *dir = - (int) i->openmax; 187 return snd_interval_max(i); 188 } 189 return -EINVAL; 190 } 191 192 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 193 snd_pcm_hw_param_t var, 194 const struct snd_mask *val) 195 { 196 int changed; 197 changed = snd_mask_refine(hw_param_mask(params, var), val); 198 if (changed) { 199 params->cmask |= 1 << var; 200 params->rmask |= 1 << var; 201 } 202 return changed; 203 } 204 205 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 206 struct snd_pcm_hw_params *params, 207 snd_pcm_hw_param_t var, 208 const struct snd_mask *val) 209 { 210 int changed = _snd_pcm_hw_param_mask(params, var, val); 211 if (changed < 0) 212 return changed; 213 if (params->rmask) { 214 int err = snd_pcm_hw_refine(pcm, params); 215 if (err < 0) 216 return err; 217 } 218 return 0; 219 } 220 221 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 222 snd_pcm_hw_param_t var, unsigned int val, 223 int dir) 224 { 225 int changed; 226 int open = 0; 227 if (dir) { 228 if (dir > 0) { 229 open = 1; 230 } else if (dir < 0) { 231 if (val > 0) { 232 open = 1; 233 val--; 234 } 235 } 236 } 237 if (hw_is_mask(var)) 238 changed = snd_mask_refine_min(hw_param_mask(params, var), 239 val + !!open); 240 else if (hw_is_interval(var)) 241 changed = snd_interval_refine_min(hw_param_interval(params, var), 242 val, open); 243 else 244 return -EINVAL; 245 if (changed) { 246 params->cmask |= 1 << var; 247 params->rmask |= 1 << var; 248 } 249 return changed; 250 } 251 252 /** 253 * snd_pcm_hw_param_min 254 * @pcm: PCM instance 255 * @params: the hw_params instance 256 * @var: parameter to retrieve 257 * @val: minimal value 258 * @dir: pointer to the direction (-1,0,1) or NULL 259 * 260 * Inside configuration space defined by PARAMS remove from PAR all 261 * values < VAL. Reduce configuration space accordingly. 262 * Return new minimum or -EINVAL if the configuration space is empty 263 */ 264 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 265 struct snd_pcm_hw_params *params, 266 snd_pcm_hw_param_t var, unsigned int val, 267 int *dir) 268 { 269 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 270 if (changed < 0) 271 return changed; 272 if (params->rmask) { 273 int err = snd_pcm_hw_refine(pcm, params); 274 if (err < 0) 275 return err; 276 } 277 return snd_pcm_hw_param_value_min(params, var, dir); 278 } 279 280 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 281 snd_pcm_hw_param_t var, unsigned int val, 282 int dir) 283 { 284 int changed; 285 int open = 0; 286 if (dir) { 287 if (dir < 0) { 288 open = 1; 289 } else if (dir > 0) { 290 open = 1; 291 val++; 292 } 293 } 294 if (hw_is_mask(var)) { 295 if (val == 0 && open) { 296 snd_mask_none(hw_param_mask(params, var)); 297 changed = -EINVAL; 298 } else 299 changed = snd_mask_refine_max(hw_param_mask(params, var), 300 val - !!open); 301 } else if (hw_is_interval(var)) 302 changed = snd_interval_refine_max(hw_param_interval(params, var), 303 val, open); 304 else 305 return -EINVAL; 306 if (changed) { 307 params->cmask |= 1 << var; 308 params->rmask |= 1 << var; 309 } 310 return changed; 311 } 312 313 /** 314 * snd_pcm_hw_param_max 315 * @pcm: PCM instance 316 * @params: the hw_params instance 317 * @var: parameter to retrieve 318 * @val: maximal value 319 * @dir: pointer to the direction (-1,0,1) or NULL 320 * 321 * Inside configuration space defined by PARAMS remove from PAR all 322 * values >= VAL + 1. Reduce configuration space accordingly. 323 * Return new maximum or -EINVAL if the configuration space is empty 324 */ 325 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 326 struct snd_pcm_hw_params *params, 327 snd_pcm_hw_param_t var, unsigned int val, 328 int *dir) 329 { 330 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 331 if (changed < 0) 332 return changed; 333 if (params->rmask) { 334 int err = snd_pcm_hw_refine(pcm, params); 335 if (err < 0) 336 return err; 337 } 338 return snd_pcm_hw_param_value_max(params, var, dir); 339 } 340 341 static int boundary_sub(int a, int adir, 342 int b, int bdir, 343 int *c, int *cdir) 344 { 345 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 346 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 347 *c = a - b; 348 *cdir = adir - bdir; 349 if (*cdir == -2) { 350 (*c)--; 351 } else if (*cdir == 2) { 352 (*c)++; 353 } 354 return 0; 355 } 356 357 static int boundary_lt(unsigned int a, int adir, 358 unsigned int b, int bdir) 359 { 360 if (adir < 0) { 361 a--; 362 adir = 1; 363 } else if (adir > 0) 364 adir = 1; 365 if (bdir < 0) { 366 b--; 367 bdir = 1; 368 } else if (bdir > 0) 369 bdir = 1; 370 return a < b || (a == b && adir < bdir); 371 } 372 373 /* Return 1 if min is nearer to best than max */ 374 static int boundary_nearer(int min, int mindir, 375 int best, int bestdir, 376 int max, int maxdir) 377 { 378 int dmin, dmindir; 379 int dmax, dmaxdir; 380 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 381 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 382 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 383 } 384 385 /** 386 * snd_pcm_hw_param_near 387 * @pcm: PCM instance 388 * @params: the hw_params instance 389 * @var: parameter to retrieve 390 * @best: value to set 391 * @dir: pointer to the direction (-1,0,1) or NULL 392 * 393 * Inside configuration space defined by PARAMS set PAR to the available value 394 * nearest to VAL. Reduce configuration space accordingly. 395 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 396 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 397 * Return the value found. 398 */ 399 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 400 struct snd_pcm_hw_params *params, 401 snd_pcm_hw_param_t var, unsigned int best, 402 int *dir) 403 { 404 struct snd_pcm_hw_params *save = NULL; 405 int v; 406 unsigned int saved_min; 407 int last = 0; 408 int min, max; 409 int mindir, maxdir; 410 int valdir = dir ? *dir : 0; 411 /* FIXME */ 412 if (best > INT_MAX) 413 best = INT_MAX; 414 min = max = best; 415 mindir = maxdir = valdir; 416 if (maxdir > 0) 417 maxdir = 0; 418 else if (maxdir == 0) 419 maxdir = -1; 420 else { 421 maxdir = 1; 422 max--; 423 } 424 save = kmalloc(sizeof(*save), GFP_KERNEL); 425 if (save == NULL) 426 return -ENOMEM; 427 *save = *params; 428 saved_min = min; 429 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 430 if (min >= 0) { 431 struct snd_pcm_hw_params *params1; 432 if (max < 0) 433 goto _end; 434 if ((unsigned int)min == saved_min && mindir == valdir) 435 goto _end; 436 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 437 if (params1 == NULL) { 438 kfree(save); 439 return -ENOMEM; 440 } 441 *params1 = *save; 442 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 443 if (max < 0) { 444 kfree(params1); 445 goto _end; 446 } 447 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 448 *params = *params1; 449 last = 1; 450 } 451 kfree(params1); 452 } else { 453 *params = *save; 454 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 455 snd_assert(max >= 0, return -EINVAL); 456 last = 1; 457 } 458 _end: 459 kfree(save); 460 if (last) 461 v = snd_pcm_hw_param_last(pcm, params, var, dir); 462 else 463 v = snd_pcm_hw_param_first(pcm, params, var, dir); 464 snd_assert(v >= 0, return -EINVAL); 465 return v; 466 } 467 468 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 469 snd_pcm_hw_param_t var, unsigned int val, 470 int dir) 471 { 472 int changed; 473 if (hw_is_mask(var)) { 474 struct snd_mask *m = hw_param_mask(params, var); 475 if (val == 0 && dir < 0) { 476 changed = -EINVAL; 477 snd_mask_none(m); 478 } else { 479 if (dir > 0) 480 val++; 481 else if (dir < 0) 482 val--; 483 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 484 } 485 } else if (hw_is_interval(var)) { 486 struct snd_interval *i = hw_param_interval(params, var); 487 if (val == 0 && dir < 0) { 488 changed = -EINVAL; 489 snd_interval_none(i); 490 } else if (dir == 0) 491 changed = snd_interval_refine_set(i, val); 492 else { 493 struct snd_interval t; 494 t.openmin = 1; 495 t.openmax = 1; 496 t.empty = 0; 497 t.integer = 0; 498 if (dir < 0) { 499 t.min = val - 1; 500 t.max = val; 501 } else { 502 t.min = val; 503 t.max = val+1; 504 } 505 changed = snd_interval_refine(i, &t); 506 } 507 } else 508 return -EINVAL; 509 if (changed) { 510 params->cmask |= 1 << var; 511 params->rmask |= 1 << var; 512 } 513 return changed; 514 } 515 516 /** 517 * snd_pcm_hw_param_set 518 * @pcm: PCM instance 519 * @params: the hw_params instance 520 * @var: parameter to retrieve 521 * @val: value to set 522 * @dir: pointer to the direction (-1,0,1) or NULL 523 * 524 * Inside configuration space defined by PARAMS remove from PAR all 525 * values != VAL. Reduce configuration space accordingly. 526 * Return VAL or -EINVAL if the configuration space is empty 527 */ 528 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 529 struct snd_pcm_hw_params *params, 530 snd_pcm_hw_param_t var, unsigned int val, 531 int dir) 532 { 533 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 534 if (changed < 0) 535 return changed; 536 if (params->rmask) { 537 int err = snd_pcm_hw_refine(pcm, params); 538 if (err < 0) 539 return err; 540 } 541 return snd_pcm_hw_param_value(params, var, NULL); 542 } 543 544 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 545 snd_pcm_hw_param_t var) 546 { 547 int changed; 548 changed = snd_interval_setinteger(hw_param_interval(params, var)); 549 if (changed) { 550 params->cmask |= 1 << var; 551 params->rmask |= 1 << var; 552 } 553 return changed; 554 } 555 556 /* 557 * plugin 558 */ 559 560 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 561 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 562 { 563 struct snd_pcm_runtime *runtime = substream->runtime; 564 struct snd_pcm_plugin *plugin, *next; 565 566 plugin = runtime->oss.plugin_first; 567 while (plugin) { 568 next = plugin->next; 569 snd_pcm_plugin_free(plugin); 570 plugin = next; 571 } 572 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 573 return 0; 574 } 575 576 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 577 { 578 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 579 plugin->next = runtime->oss.plugin_first; 580 plugin->prev = NULL; 581 if (runtime->oss.plugin_first) { 582 runtime->oss.plugin_first->prev = plugin; 583 runtime->oss.plugin_first = plugin; 584 } else { 585 runtime->oss.plugin_last = 586 runtime->oss.plugin_first = plugin; 587 } 588 return 0; 589 } 590 591 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 592 { 593 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 594 plugin->next = NULL; 595 plugin->prev = runtime->oss.plugin_last; 596 if (runtime->oss.plugin_last) { 597 runtime->oss.plugin_last->next = plugin; 598 runtime->oss.plugin_last = plugin; 599 } else { 600 runtime->oss.plugin_last = 601 runtime->oss.plugin_first = plugin; 602 } 603 return 0; 604 } 605 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 606 607 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 608 { 609 struct snd_pcm_runtime *runtime = substream->runtime; 610 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 611 long bytes = frames_to_bytes(runtime, frames); 612 if (buffer_size == runtime->oss.buffer_bytes) 613 return bytes; 614 #if BITS_PER_LONG >= 64 615 return runtime->oss.buffer_bytes * bytes / buffer_size; 616 #else 617 { 618 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 619 u32 rem; 620 div64_32(&bsize, buffer_size, &rem); 621 return (long)bsize; 622 } 623 #endif 624 } 625 626 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 627 { 628 struct snd_pcm_runtime *runtime = substream->runtime; 629 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 630 if (buffer_size == runtime->oss.buffer_bytes) 631 return bytes_to_frames(runtime, bytes); 632 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 633 } 634 635 /* define extended formats in the recent OSS versions (if any) */ 636 /* linear formats */ 637 #define AFMT_S32_LE 0x00001000 638 #define AFMT_S32_BE 0x00002000 639 #define AFMT_S24_LE 0x00008000 640 #define AFMT_S24_BE 0x00010000 641 #define AFMT_S24_PACKED 0x00040000 642 643 /* other supported formats */ 644 #define AFMT_FLOAT 0x00004000 645 #define AFMT_SPDIF_RAW 0x00020000 646 647 /* unsupported formats */ 648 #define AFMT_AC3 0x00000400 649 #define AFMT_VORBIS 0x00000800 650 651 static int snd_pcm_oss_format_from(int format) 652 { 653 switch (format) { 654 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 655 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 656 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 657 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 658 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 659 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 660 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 661 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 662 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 663 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 664 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 665 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 666 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 667 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 668 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 669 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 670 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 671 default: return SNDRV_PCM_FORMAT_U8; 672 } 673 } 674 675 static int snd_pcm_oss_format_to(int format) 676 { 677 switch (format) { 678 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 679 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 680 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 681 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 682 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 683 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 684 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 685 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 686 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 687 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 688 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 689 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 690 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 691 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 692 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 693 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 694 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 695 default: return -EINVAL; 696 } 697 } 698 699 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 700 struct snd_pcm_hw_params *oss_params, 701 struct snd_pcm_hw_params *slave_params) 702 { 703 size_t s; 704 size_t oss_buffer_size, oss_period_size, oss_periods; 705 size_t min_period_size, max_period_size; 706 struct snd_pcm_runtime *runtime = substream->runtime; 707 size_t oss_frame_size; 708 709 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 710 params_channels(oss_params) / 8; 711 712 oss_buffer_size = snd_pcm_plug_client_size(substream, 713 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 714 oss_buffer_size = 1 << ld2(oss_buffer_size); 715 if (atomic_read(&substream->mmap_count)) { 716 if (oss_buffer_size > runtime->oss.mmap_bytes) 717 oss_buffer_size = runtime->oss.mmap_bytes; 718 } 719 720 if (substream->oss.setup.period_size > 16) 721 oss_period_size = substream->oss.setup.period_size; 722 else if (runtime->oss.fragshift) { 723 oss_period_size = 1 << runtime->oss.fragshift; 724 if (oss_period_size > oss_buffer_size / 2) 725 oss_period_size = oss_buffer_size / 2; 726 } else { 727 int sd; 728 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 729 730 oss_period_size = oss_buffer_size; 731 do { 732 oss_period_size /= 2; 733 } while (oss_period_size > bytes_per_sec); 734 if (runtime->oss.subdivision == 0) { 735 sd = 4; 736 if (oss_period_size / sd > 4096) 737 sd *= 2; 738 if (oss_period_size / sd < 4096) 739 sd = 1; 740 } else 741 sd = runtime->oss.subdivision; 742 oss_period_size /= sd; 743 if (oss_period_size < 16) 744 oss_period_size = 16; 745 } 746 747 min_period_size = snd_pcm_plug_client_size(substream, 748 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 749 min_period_size *= oss_frame_size; 750 min_period_size = 1 << (ld2(min_period_size - 1) + 1); 751 if (oss_period_size < min_period_size) 752 oss_period_size = min_period_size; 753 754 max_period_size = snd_pcm_plug_client_size(substream, 755 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 756 max_period_size *= oss_frame_size; 757 max_period_size = 1 << ld2(max_period_size); 758 if (oss_period_size > max_period_size) 759 oss_period_size = max_period_size; 760 761 oss_periods = oss_buffer_size / oss_period_size; 762 763 if (substream->oss.setup.periods > 1) 764 oss_periods = substream->oss.setup.periods; 765 766 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 767 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 768 s = runtime->oss.maxfrags; 769 if (oss_periods > s) 770 oss_periods = s; 771 772 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 773 if (s < 2) 774 s = 2; 775 if (oss_periods < s) 776 oss_periods = s; 777 778 while (oss_period_size * oss_periods > oss_buffer_size) 779 oss_period_size /= 2; 780 781 snd_assert(oss_period_size >= 16, return -EINVAL); 782 runtime->oss.period_bytes = oss_period_size; 783 runtime->oss.period_frames = 1; 784 runtime->oss.periods = oss_periods; 785 return 0; 786 } 787 788 static int choose_rate(struct snd_pcm_substream *substream, 789 struct snd_pcm_hw_params *params, unsigned int best_rate) 790 { 791 struct snd_interval *it; 792 struct snd_pcm_hw_params *save; 793 unsigned int rate, prev; 794 795 save = kmalloc(sizeof(*save), GFP_KERNEL); 796 if (save == NULL) 797 return -ENOMEM; 798 *save = *params; 799 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 800 801 /* try multiples of the best rate */ 802 rate = best_rate; 803 for (;;) { 804 if (it->max < rate || (it->max == rate && it->openmax)) 805 break; 806 if (it->min < rate || (it->min == rate && !it->openmin)) { 807 int ret; 808 ret = snd_pcm_hw_param_set(substream, params, 809 SNDRV_PCM_HW_PARAM_RATE, 810 rate, 0); 811 if (ret == (int)rate) { 812 kfree(save); 813 return rate; 814 } 815 *params = *save; 816 } 817 prev = rate; 818 rate += best_rate; 819 if (rate <= prev) 820 break; 821 } 822 823 /* not found, use the nearest rate */ 824 kfree(save); 825 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 826 } 827 828 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 829 { 830 struct snd_pcm_runtime *runtime = substream->runtime; 831 struct snd_pcm_hw_params *params, *sparams; 832 struct snd_pcm_sw_params *sw_params; 833 ssize_t oss_buffer_size, oss_period_size; 834 size_t oss_frame_size; 835 int err; 836 int direct; 837 int format, sformat, n; 838 struct snd_mask sformat_mask; 839 struct snd_mask mask; 840 841 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 842 return -EINTR; 843 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 844 params = kmalloc(sizeof(*params), GFP_KERNEL); 845 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 846 if (!sw_params || !params || !sparams) { 847 snd_printd("No memory\n"); 848 err = -ENOMEM; 849 goto failure; 850 } 851 852 if (atomic_read(&substream->mmap_count)) 853 direct = 1; 854 else 855 direct = substream->oss.setup.direct; 856 857 _snd_pcm_hw_params_any(sparams); 858 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 859 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 860 snd_mask_none(&mask); 861 if (atomic_read(&substream->mmap_count)) 862 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 863 else { 864 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); 865 if (!direct) 866 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 867 } 868 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 869 if (err < 0) { 870 snd_printd("No usable accesses\n"); 871 err = -EINVAL; 872 goto failure; 873 } 874 choose_rate(substream, sparams, runtime->oss.rate); 875 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 876 877 format = snd_pcm_oss_format_from(runtime->oss.format); 878 879 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 880 if (direct) 881 sformat = format; 882 else 883 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 884 885 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { 886 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { 887 if (snd_mask_test(&sformat_mask, sformat) && 888 snd_pcm_oss_format_to(sformat) >= 0) 889 break; 890 } 891 if (sformat > SNDRV_PCM_FORMAT_LAST) { 892 snd_printd("Cannot find a format!!!\n"); 893 err = -EINVAL; 894 goto failure; 895 } 896 } 897 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); 898 snd_assert(err >= 0, goto failure); 899 900 if (direct) { 901 memcpy(params, sparams, sizeof(*params)); 902 } else { 903 _snd_pcm_hw_params_any(params); 904 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 905 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 906 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 907 snd_pcm_oss_format_from(runtime->oss.format), 0); 908 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 909 runtime->oss.channels, 0); 910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 911 runtime->oss.rate, 0); 912 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 913 params_access(params), params_format(params), 914 params_channels(params), params_rate(params)); 915 } 916 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 917 params_access(sparams), params_format(sparams), 918 params_channels(sparams), params_rate(sparams)); 919 920 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 921 params_channels(params) / 8; 922 923 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 924 snd_pcm_oss_plugin_clear(substream); 925 if (!direct) { 926 /* add necessary plugins */ 927 snd_pcm_oss_plugin_clear(substream); 928 if ((err = snd_pcm_plug_format_plugins(substream, 929 params, 930 sparams)) < 0) { 931 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); 932 snd_pcm_oss_plugin_clear(substream); 933 goto failure; 934 } 935 if (runtime->oss.plugin_first) { 936 struct snd_pcm_plugin *plugin; 937 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 938 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 939 snd_pcm_oss_plugin_clear(substream); 940 goto failure; 941 } 942 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 943 err = snd_pcm_plugin_append(plugin); 944 } else { 945 err = snd_pcm_plugin_insert(plugin); 946 } 947 if (err < 0) { 948 snd_pcm_oss_plugin_clear(substream); 949 goto failure; 950 } 951 } 952 } 953 #endif 954 955 err = snd_pcm_oss_period_size(substream, params, sparams); 956 if (err < 0) 957 goto failure; 958 959 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 960 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 961 snd_assert(err >= 0, goto failure); 962 963 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 964 runtime->oss.periods, NULL); 965 snd_assert(err >= 0, goto failure); 966 967 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 968 969 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 970 snd_printd("HW_PARAMS failed: %i\n", err); 971 goto failure; 972 } 973 974 memset(sw_params, 0, sizeof(*sw_params)); 975 if (runtime->oss.trigger) { 976 sw_params->start_threshold = 1; 977 } else { 978 sw_params->start_threshold = runtime->boundary; 979 } 980 if (atomic_read(&substream->mmap_count) || 981 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 982 sw_params->stop_threshold = runtime->boundary; 983 else 984 sw_params->stop_threshold = runtime->buffer_size; 985 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 986 sw_params->period_step = 1; 987 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 988 1 : runtime->period_size; 989 if (atomic_read(&substream->mmap_count) || 990 substream->oss.setup.nosilence) { 991 sw_params->silence_threshold = 0; 992 sw_params->silence_size = 0; 993 } else { 994 snd_pcm_uframes_t frames; 995 frames = runtime->period_size + 16; 996 if (frames > runtime->buffer_size) 997 frames = runtime->buffer_size; 998 sw_params->silence_threshold = frames; 999 sw_params->silence_size = frames; 1000 } 1001 1002 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1003 snd_printd("SW_PARAMS failed: %i\n", err); 1004 goto failure; 1005 } 1006 1007 runtime->oss.periods = params_periods(sparams); 1008 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1009 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure); 1010 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1011 if (runtime->oss.plugin_first) { 1012 err = snd_pcm_plug_alloc(substream, oss_period_size); 1013 if (err < 0) 1014 goto failure; 1015 } 1016 #endif 1017 oss_period_size *= oss_frame_size; 1018 1019 oss_buffer_size = oss_period_size * runtime->oss.periods; 1020 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure); 1021 1022 runtime->oss.period_bytes = oss_period_size; 1023 runtime->oss.buffer_bytes = oss_buffer_size; 1024 1025 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1026 runtime->oss.period_bytes, 1027 runtime->oss.buffer_bytes); 1028 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1029 params_period_size(sparams), 1030 params_buffer_size(sparams)); 1031 1032 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1033 runtime->oss.channels = params_channels(params); 1034 runtime->oss.rate = params_rate(params); 1035 1036 runtime->oss.params = 0; 1037 runtime->oss.prepare = 1; 1038 vfree(runtime->oss.buffer); 1039 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1040 runtime->oss.buffer_used = 0; 1041 if (runtime->dma_area) 1042 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1043 1044 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1045 1046 err = 0; 1047 failure: 1048 kfree(sw_params); 1049 kfree(params); 1050 kfree(sparams); 1051 mutex_unlock(&runtime->oss.params_lock); 1052 return err; 1053 } 1054 1055 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1056 { 1057 int idx, err; 1058 struct snd_pcm_substream *asubstream = NULL, *substream; 1059 1060 for (idx = 0; idx < 2; idx++) { 1061 substream = pcm_oss_file->streams[idx]; 1062 if (substream == NULL) 1063 continue; 1064 if (asubstream == NULL) 1065 asubstream = substream; 1066 if (substream->runtime->oss.params) { 1067 err = snd_pcm_oss_change_params(substream); 1068 if (err < 0) 1069 return err; 1070 } 1071 } 1072 snd_assert(asubstream != NULL, return -EIO); 1073 if (r_substream) 1074 *r_substream = asubstream; 1075 return 0; 1076 } 1077 1078 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1079 { 1080 int err; 1081 struct snd_pcm_runtime *runtime = substream->runtime; 1082 1083 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1084 if (err < 0) { 1085 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1086 return err; 1087 } 1088 runtime->oss.prepare = 0; 1089 runtime->oss.prev_hw_ptr_interrupt = 0; 1090 runtime->oss.period_ptr = 0; 1091 runtime->oss.buffer_used = 0; 1092 1093 return 0; 1094 } 1095 1096 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1097 { 1098 struct snd_pcm_runtime *runtime; 1099 int err; 1100 1101 if (substream == NULL) 1102 return 0; 1103 runtime = substream->runtime; 1104 if (runtime->oss.params) { 1105 err = snd_pcm_oss_change_params(substream); 1106 if (err < 0) 1107 return err; 1108 } 1109 if (runtime->oss.prepare) { 1110 err = snd_pcm_oss_prepare(substream); 1111 if (err < 0) 1112 return err; 1113 } 1114 return 0; 1115 } 1116 1117 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1118 { 1119 struct snd_pcm_runtime *runtime; 1120 snd_pcm_uframes_t frames; 1121 int err = 0; 1122 1123 while (1) { 1124 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1125 if (err < 0) 1126 break; 1127 runtime = substream->runtime; 1128 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1129 break; 1130 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1131 /* until avail(delay) <= buffer_size */ 1132 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1133 frames /= runtime->period_size; 1134 frames *= runtime->period_size; 1135 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1136 if (err < 0) 1137 break; 1138 } 1139 return err; 1140 } 1141 1142 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1143 { 1144 struct snd_pcm_runtime *runtime = substream->runtime; 1145 int ret; 1146 while (1) { 1147 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1148 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1149 #ifdef OSS_DEBUG 1150 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1151 printk("pcm_oss: write: recovering from XRUN\n"); 1152 else 1153 printk("pcm_oss: write: recovering from SUSPEND\n"); 1154 #endif 1155 ret = snd_pcm_oss_prepare(substream); 1156 if (ret < 0) 1157 break; 1158 } 1159 if (in_kernel) { 1160 mm_segment_t fs; 1161 fs = snd_enter_user(); 1162 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1163 snd_leave_user(fs); 1164 } else { 1165 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1166 } 1167 if (ret != -EPIPE && ret != -ESTRPIPE) 1168 break; 1169 /* test, if we can't store new data, because the stream */ 1170 /* has not been started */ 1171 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1172 return -EAGAIN; 1173 } 1174 return ret; 1175 } 1176 1177 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1178 { 1179 struct snd_pcm_runtime *runtime = substream->runtime; 1180 snd_pcm_sframes_t delay; 1181 int ret; 1182 while (1) { 1183 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1184 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1185 #ifdef OSS_DEBUG 1186 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1187 printk("pcm_oss: read: recovering from XRUN\n"); 1188 else 1189 printk("pcm_oss: read: recovering from SUSPEND\n"); 1190 #endif 1191 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1192 if (ret < 0) 1193 break; 1194 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1195 ret = snd_pcm_oss_prepare(substream); 1196 if (ret < 0) 1197 break; 1198 } 1199 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1200 if (ret < 0) 1201 break; 1202 if (in_kernel) { 1203 mm_segment_t fs; 1204 fs = snd_enter_user(); 1205 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1206 snd_leave_user(fs); 1207 } else { 1208 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1209 } 1210 if (ret == -EPIPE) { 1211 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1212 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1213 if (ret < 0) 1214 break; 1215 } 1216 continue; 1217 } 1218 if (ret != -ESTRPIPE) 1219 break; 1220 } 1221 return ret; 1222 } 1223 1224 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1225 { 1226 struct snd_pcm_runtime *runtime = substream->runtime; 1227 int ret; 1228 while (1) { 1229 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1230 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1231 #ifdef OSS_DEBUG 1232 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1233 printk("pcm_oss: writev: recovering from XRUN\n"); 1234 else 1235 printk("pcm_oss: writev: recovering from SUSPEND\n"); 1236 #endif 1237 ret = snd_pcm_oss_prepare(substream); 1238 if (ret < 0) 1239 break; 1240 } 1241 if (in_kernel) { 1242 mm_segment_t fs; 1243 fs = snd_enter_user(); 1244 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1245 snd_leave_user(fs); 1246 } else { 1247 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1248 } 1249 if (ret != -EPIPE && ret != -ESTRPIPE) 1250 break; 1251 1252 /* test, if we can't store new data, because the stream */ 1253 /* has not been started */ 1254 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1255 return -EAGAIN; 1256 } 1257 return ret; 1258 } 1259 1260 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1261 { 1262 struct snd_pcm_runtime *runtime = substream->runtime; 1263 int ret; 1264 while (1) { 1265 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1266 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1267 #ifdef OSS_DEBUG 1268 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1269 printk("pcm_oss: readv: recovering from XRUN\n"); 1270 else 1271 printk("pcm_oss: readv: recovering from SUSPEND\n"); 1272 #endif 1273 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1274 if (ret < 0) 1275 break; 1276 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1277 ret = snd_pcm_oss_prepare(substream); 1278 if (ret < 0) 1279 break; 1280 } 1281 if (in_kernel) { 1282 mm_segment_t fs; 1283 fs = snd_enter_user(); 1284 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1285 snd_leave_user(fs); 1286 } else { 1287 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1288 } 1289 if (ret != -EPIPE && ret != -ESTRPIPE) 1290 break; 1291 } 1292 return ret; 1293 } 1294 1295 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1296 { 1297 struct snd_pcm_runtime *runtime = substream->runtime; 1298 snd_pcm_sframes_t frames, frames1; 1299 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1300 if (runtime->oss.plugin_first) { 1301 struct snd_pcm_plugin_channel *channels; 1302 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1303 if (!in_kernel) { 1304 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) 1305 return -EFAULT; 1306 buf = runtime->oss.buffer; 1307 } 1308 frames = bytes / oss_frame_bytes; 1309 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1310 if (frames1 < 0) 1311 return frames1; 1312 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1313 if (frames1 <= 0) 1314 return frames1; 1315 bytes = frames1 * oss_frame_bytes; 1316 } else 1317 #endif 1318 { 1319 frames = bytes_to_frames(runtime, bytes); 1320 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1321 if (frames1 <= 0) 1322 return frames1; 1323 bytes = frames_to_bytes(runtime, frames1); 1324 } 1325 return bytes; 1326 } 1327 1328 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1329 { 1330 size_t xfer = 0; 1331 ssize_t tmp; 1332 struct snd_pcm_runtime *runtime = substream->runtime; 1333 1334 if (atomic_read(&substream->mmap_count)) 1335 return -ENXIO; 1336 1337 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1338 return tmp; 1339 mutex_lock(&runtime->oss.params_lock); 1340 while (bytes > 0) { 1341 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1342 tmp = bytes; 1343 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1344 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1345 if (tmp > 0) { 1346 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1347 tmp = -EFAULT; 1348 goto err; 1349 } 1350 } 1351 runtime->oss.buffer_used += tmp; 1352 buf += tmp; 1353 bytes -= tmp; 1354 xfer += tmp; 1355 if (substream->oss.setup.partialfrag || 1356 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1357 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1358 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1359 if (tmp <= 0) 1360 goto err; 1361 runtime->oss.bytes += tmp; 1362 runtime->oss.period_ptr += tmp; 1363 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1364 if (runtime->oss.period_ptr == 0 || 1365 runtime->oss.period_ptr == runtime->oss.buffer_used) 1366 runtime->oss.buffer_used = 0; 1367 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1368 tmp = -EAGAIN; 1369 goto err; 1370 } 1371 } 1372 } else { 1373 tmp = snd_pcm_oss_write2(substream, 1374 (const char __force *)buf, 1375 runtime->oss.period_bytes, 0); 1376 if (tmp <= 0) 1377 goto err; 1378 runtime->oss.bytes += tmp; 1379 buf += tmp; 1380 bytes -= tmp; 1381 xfer += tmp; 1382 if ((substream->f_flags & O_NONBLOCK) != 0 && 1383 tmp != runtime->oss.period_bytes) 1384 break; 1385 } 1386 } 1387 mutex_unlock(&runtime->oss.params_lock); 1388 return xfer; 1389 1390 err: 1391 mutex_unlock(&runtime->oss.params_lock); 1392 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1393 } 1394 1395 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1396 { 1397 struct snd_pcm_runtime *runtime = substream->runtime; 1398 snd_pcm_sframes_t frames, frames1; 1399 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1400 char __user *final_dst = (char __user *)buf; 1401 if (runtime->oss.plugin_first) { 1402 struct snd_pcm_plugin_channel *channels; 1403 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1404 if (!in_kernel) 1405 buf = runtime->oss.buffer; 1406 frames = bytes / oss_frame_bytes; 1407 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1408 if (frames1 < 0) 1409 return frames1; 1410 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1411 if (frames1 <= 0) 1412 return frames1; 1413 bytes = frames1 * oss_frame_bytes; 1414 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1415 return -EFAULT; 1416 } else 1417 #endif 1418 { 1419 frames = bytes_to_frames(runtime, bytes); 1420 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1421 if (frames1 <= 0) 1422 return frames1; 1423 bytes = frames_to_bytes(runtime, frames1); 1424 } 1425 return bytes; 1426 } 1427 1428 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1429 { 1430 size_t xfer = 0; 1431 ssize_t tmp; 1432 struct snd_pcm_runtime *runtime = substream->runtime; 1433 1434 if (atomic_read(&substream->mmap_count)) 1435 return -ENXIO; 1436 1437 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1438 return tmp; 1439 mutex_lock(&runtime->oss.params_lock); 1440 while (bytes > 0) { 1441 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1442 if (runtime->oss.buffer_used == 0) { 1443 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1444 if (tmp <= 0) 1445 goto err; 1446 runtime->oss.bytes += tmp; 1447 runtime->oss.period_ptr = tmp; 1448 runtime->oss.buffer_used = tmp; 1449 } 1450 tmp = bytes; 1451 if ((size_t) tmp > runtime->oss.buffer_used) 1452 tmp = runtime->oss.buffer_used; 1453 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1454 tmp = -EFAULT; 1455 goto err; 1456 } 1457 buf += tmp; 1458 bytes -= tmp; 1459 xfer += tmp; 1460 runtime->oss.buffer_used -= tmp; 1461 } else { 1462 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1463 runtime->oss.period_bytes, 0); 1464 if (tmp <= 0) 1465 goto err; 1466 runtime->oss.bytes += tmp; 1467 buf += tmp; 1468 bytes -= tmp; 1469 xfer += tmp; 1470 } 1471 } 1472 mutex_unlock(&runtime->oss.params_lock); 1473 return xfer; 1474 1475 err: 1476 mutex_unlock(&runtime->oss.params_lock); 1477 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1478 } 1479 1480 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1481 { 1482 struct snd_pcm_substream *substream; 1483 1484 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1485 if (substream != NULL) { 1486 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1487 substream->runtime->oss.prepare = 1; 1488 } 1489 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1490 if (substream != NULL) { 1491 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1492 substream->runtime->oss.prepare = 1; 1493 } 1494 return 0; 1495 } 1496 1497 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1498 { 1499 struct snd_pcm_substream *substream; 1500 int err; 1501 1502 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1503 if (substream != NULL) { 1504 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1505 return err; 1506 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1507 } 1508 /* note: all errors from the start action are ignored */ 1509 /* OSS apps do not know, how to handle them */ 1510 return 0; 1511 } 1512 1513 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1514 { 1515 struct snd_pcm_runtime *runtime; 1516 ssize_t result = 0; 1517 long res; 1518 wait_queue_t wait; 1519 1520 runtime = substream->runtime; 1521 init_waitqueue_entry(&wait, current); 1522 add_wait_queue(&runtime->sleep, &wait); 1523 #ifdef OSS_DEBUG 1524 printk("sync1: size = %li\n", size); 1525 #endif 1526 while (1) { 1527 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1528 if (result > 0) { 1529 runtime->oss.buffer_used = 0; 1530 result = 0; 1531 break; 1532 } 1533 if (result != 0 && result != -EAGAIN) 1534 break; 1535 result = 0; 1536 set_current_state(TASK_INTERRUPTIBLE); 1537 snd_pcm_stream_lock_irq(substream); 1538 res = runtime->status->state; 1539 snd_pcm_stream_unlock_irq(substream); 1540 if (res != SNDRV_PCM_STATE_RUNNING) { 1541 set_current_state(TASK_RUNNING); 1542 break; 1543 } 1544 res = schedule_timeout(10 * HZ); 1545 if (signal_pending(current)) { 1546 result = -ERESTARTSYS; 1547 break; 1548 } 1549 if (res == 0) { 1550 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1551 result = -EIO; 1552 break; 1553 } 1554 } 1555 remove_wait_queue(&runtime->sleep, &wait); 1556 return result; 1557 } 1558 1559 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1560 { 1561 int err = 0; 1562 unsigned int saved_f_flags; 1563 struct snd_pcm_substream *substream; 1564 struct snd_pcm_runtime *runtime; 1565 snd_pcm_format_t format; 1566 unsigned long width; 1567 size_t size; 1568 1569 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1570 if (substream != NULL) { 1571 runtime = substream->runtime; 1572 if (atomic_read(&substream->mmap_count)) 1573 goto __direct; 1574 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1575 return err; 1576 format = snd_pcm_oss_format_from(runtime->oss.format); 1577 width = snd_pcm_format_physical_width(format); 1578 mutex_lock(&runtime->oss.params_lock); 1579 if (runtime->oss.buffer_used > 0) { 1580 #ifdef OSS_DEBUG 1581 printk("sync: buffer_used\n"); 1582 #endif 1583 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1584 snd_pcm_format_set_silence(format, 1585 runtime->oss.buffer + runtime->oss.buffer_used, 1586 size); 1587 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1588 if (err < 0) { 1589 mutex_unlock(&runtime->oss.params_lock); 1590 return err; 1591 } 1592 } else if (runtime->oss.period_ptr > 0) { 1593 #ifdef OSS_DEBUG 1594 printk("sync: period_ptr\n"); 1595 #endif 1596 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1597 snd_pcm_format_set_silence(format, 1598 runtime->oss.buffer, 1599 size * 8 / width); 1600 err = snd_pcm_oss_sync1(substream, size); 1601 if (err < 0) { 1602 mutex_unlock(&runtime->oss.params_lock); 1603 return err; 1604 } 1605 } 1606 /* 1607 * The ALSA's period might be a bit large than OSS one. 1608 * Fill the remain portion of ALSA period with zeros. 1609 */ 1610 size = runtime->control->appl_ptr % runtime->period_size; 1611 if (size > 0) { 1612 size = runtime->period_size - size; 1613 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1614 size = (runtime->frame_bits * size) / 8; 1615 while (size > 0) { 1616 mm_segment_t fs; 1617 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1618 size -= size1; 1619 size1 *= 8; 1620 size1 /= runtime->sample_bits; 1621 snd_pcm_format_set_silence(runtime->format, 1622 runtime->oss.buffer, 1623 size1); 1624 size1 /= runtime->channels; /* frames */ 1625 fs = snd_enter_user(); 1626 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1627 snd_leave_user(fs); 1628 } 1629 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1630 void __user *buffers[runtime->channels]; 1631 memset(buffers, 0, runtime->channels * sizeof(void *)); 1632 snd_pcm_lib_writev(substream, buffers, size); 1633 } 1634 } 1635 mutex_unlock(&runtime->oss.params_lock); 1636 /* 1637 * finish sync: drain the buffer 1638 */ 1639 __direct: 1640 saved_f_flags = substream->f_flags; 1641 substream->f_flags &= ~O_NONBLOCK; 1642 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1643 substream->f_flags = saved_f_flags; 1644 if (err < 0) 1645 return err; 1646 runtime->oss.prepare = 1; 1647 } 1648 1649 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1650 if (substream != NULL) { 1651 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1652 return err; 1653 runtime = substream->runtime; 1654 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1655 if (err < 0) 1656 return err; 1657 runtime->oss.buffer_used = 0; 1658 runtime->oss.prepare = 1; 1659 } 1660 return 0; 1661 } 1662 1663 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1664 { 1665 int idx; 1666 1667 for (idx = 1; idx >= 0; --idx) { 1668 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1669 struct snd_pcm_runtime *runtime; 1670 if (substream == NULL) 1671 continue; 1672 runtime = substream->runtime; 1673 if (rate < 1000) 1674 rate = 1000; 1675 else if (rate > 192000) 1676 rate = 192000; 1677 if (runtime->oss.rate != rate) { 1678 runtime->oss.params = 1; 1679 runtime->oss.rate = rate; 1680 } 1681 } 1682 return snd_pcm_oss_get_rate(pcm_oss_file); 1683 } 1684 1685 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1686 { 1687 struct snd_pcm_substream *substream; 1688 int err; 1689 1690 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1691 return err; 1692 return substream->runtime->oss.rate; 1693 } 1694 1695 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1696 { 1697 int idx; 1698 if (channels < 1) 1699 channels = 1; 1700 if (channels > 128) 1701 return -EINVAL; 1702 for (idx = 1; idx >= 0; --idx) { 1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1704 struct snd_pcm_runtime *runtime; 1705 if (substream == NULL) 1706 continue; 1707 runtime = substream->runtime; 1708 if (runtime->oss.channels != channels) { 1709 runtime->oss.params = 1; 1710 runtime->oss.channels = channels; 1711 } 1712 } 1713 return snd_pcm_oss_get_channels(pcm_oss_file); 1714 } 1715 1716 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1717 { 1718 struct snd_pcm_substream *substream; 1719 int err; 1720 1721 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1722 return err; 1723 return substream->runtime->oss.channels; 1724 } 1725 1726 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1727 { 1728 struct snd_pcm_substream *substream; 1729 int err; 1730 1731 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1732 return err; 1733 return substream->runtime->oss.period_bytes; 1734 } 1735 1736 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1737 { 1738 struct snd_pcm_substream *substream; 1739 int err; 1740 int direct; 1741 struct snd_pcm_hw_params *params; 1742 unsigned int formats = 0; 1743 struct snd_mask format_mask; 1744 int fmt; 1745 1746 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1747 return err; 1748 if (atomic_read(&substream->mmap_count)) 1749 direct = 1; 1750 else 1751 direct = substream->oss.setup.direct; 1752 if (!direct) 1753 return AFMT_MU_LAW | AFMT_U8 | 1754 AFMT_S16_LE | AFMT_S16_BE | 1755 AFMT_S8 | AFMT_U16_LE | 1756 AFMT_U16_BE | 1757 AFMT_S32_LE | AFMT_S32_BE | 1758 AFMT_S24_LE | AFMT_S24_LE | 1759 AFMT_S24_PACKED; 1760 params = kmalloc(sizeof(*params), GFP_KERNEL); 1761 if (!params) 1762 return -ENOMEM; 1763 _snd_pcm_hw_params_any(params); 1764 err = snd_pcm_hw_refine(substream, params); 1765 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1766 kfree(params); 1767 snd_assert(err >= 0, return err); 1768 for (fmt = 0; fmt < 32; ++fmt) { 1769 if (snd_mask_test(&format_mask, fmt)) { 1770 int f = snd_pcm_oss_format_to(fmt); 1771 if (f >= 0) 1772 formats |= f; 1773 } 1774 } 1775 return formats; 1776 } 1777 1778 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1779 { 1780 int formats, idx; 1781 1782 if (format != AFMT_QUERY) { 1783 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1784 if (formats < 0) 1785 return formats; 1786 if (!(formats & format)) 1787 format = AFMT_U8; 1788 for (idx = 1; idx >= 0; --idx) { 1789 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1790 struct snd_pcm_runtime *runtime; 1791 if (substream == NULL) 1792 continue; 1793 runtime = substream->runtime; 1794 if (runtime->oss.format != format) { 1795 runtime->oss.params = 1; 1796 runtime->oss.format = format; 1797 } 1798 } 1799 } 1800 return snd_pcm_oss_get_format(pcm_oss_file); 1801 } 1802 1803 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1804 { 1805 struct snd_pcm_substream *substream; 1806 int err; 1807 1808 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1809 return err; 1810 return substream->runtime->oss.format; 1811 } 1812 1813 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1814 { 1815 struct snd_pcm_runtime *runtime; 1816 1817 if (substream == NULL) 1818 return 0; 1819 runtime = substream->runtime; 1820 if (subdivide == 0) { 1821 subdivide = runtime->oss.subdivision; 1822 if (subdivide == 0) 1823 subdivide = 1; 1824 return subdivide; 1825 } 1826 if (runtime->oss.subdivision || runtime->oss.fragshift) 1827 return -EINVAL; 1828 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1829 subdivide != 8 && subdivide != 16) 1830 return -EINVAL; 1831 runtime->oss.subdivision = subdivide; 1832 runtime->oss.params = 1; 1833 return subdivide; 1834 } 1835 1836 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1837 { 1838 int err = -EINVAL, idx; 1839 1840 for (idx = 1; idx >= 0; --idx) { 1841 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1842 if (substream == NULL) 1843 continue; 1844 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1845 return err; 1846 } 1847 return err; 1848 } 1849 1850 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1851 { 1852 struct snd_pcm_runtime *runtime; 1853 1854 if (substream == NULL) 1855 return 0; 1856 runtime = substream->runtime; 1857 if (runtime->oss.subdivision || runtime->oss.fragshift) 1858 return -EINVAL; 1859 runtime->oss.fragshift = val & 0xffff; 1860 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1861 if (runtime->oss.fragshift < 4) /* < 16 */ 1862 runtime->oss.fragshift = 4; 1863 if (runtime->oss.maxfrags < 2) 1864 runtime->oss.maxfrags = 2; 1865 runtime->oss.params = 1; 1866 return 0; 1867 } 1868 1869 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1870 { 1871 int err = -EINVAL, idx; 1872 1873 for (idx = 1; idx >= 0; --idx) { 1874 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1875 if (substream == NULL) 1876 continue; 1877 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1878 return err; 1879 } 1880 return err; 1881 } 1882 1883 static int snd_pcm_oss_nonblock(struct file * file) 1884 { 1885 file->f_flags |= O_NONBLOCK; 1886 return 0; 1887 } 1888 1889 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1890 { 1891 1892 if (substream == NULL) { 1893 res &= ~DSP_CAP_DUPLEX; 1894 return res; 1895 } 1896 #ifdef DSP_CAP_MULTI 1897 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1898 if (substream->pstr->substream_count > 1) 1899 res |= DSP_CAP_MULTI; 1900 #endif 1901 /* DSP_CAP_REALTIME is set all times: */ 1902 /* all ALSA drivers can return actual pointer in ring buffer */ 1903 #if defined(DSP_CAP_REALTIME) && 0 1904 { 1905 struct snd_pcm_runtime *runtime = substream->runtime; 1906 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1907 res &= ~DSP_CAP_REALTIME; 1908 } 1909 #endif 1910 return res; 1911 } 1912 1913 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1914 { 1915 int result, idx; 1916 1917 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1918 for (idx = 0; idx < 2; idx++) { 1919 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1920 result = snd_pcm_oss_get_caps1(substream, result); 1921 } 1922 result |= 0x0001; /* revision - same as SB AWE 64 */ 1923 return result; 1924 } 1925 1926 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr) 1927 { 1928 struct snd_pcm_runtime *runtime = substream->runtime; 1929 snd_pcm_uframes_t appl_ptr; 1930 appl_ptr = hw_ptr + runtime->buffer_size; 1931 appl_ptr %= runtime->boundary; 1932 runtime->control->appl_ptr = appl_ptr; 1933 } 1934 1935 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1936 { 1937 struct snd_pcm_runtime *runtime; 1938 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1939 int err, cmd; 1940 1941 #ifdef OSS_DEBUG 1942 printk("pcm_oss: trigger = 0x%x\n", trigger); 1943 #endif 1944 1945 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1946 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1947 1948 if (psubstream) { 1949 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1950 return err; 1951 } 1952 if (csubstream) { 1953 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1954 return err; 1955 } 1956 if (psubstream) { 1957 runtime = psubstream->runtime; 1958 if (trigger & PCM_ENABLE_OUTPUT) { 1959 if (runtime->oss.trigger) 1960 goto _skip1; 1961 if (atomic_read(&psubstream->mmap_count)) 1962 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); 1963 runtime->oss.trigger = 1; 1964 runtime->start_threshold = 1; 1965 cmd = SNDRV_PCM_IOCTL_START; 1966 } else { 1967 if (!runtime->oss.trigger) 1968 goto _skip1; 1969 runtime->oss.trigger = 0; 1970 runtime->start_threshold = runtime->boundary; 1971 cmd = SNDRV_PCM_IOCTL_DROP; 1972 runtime->oss.prepare = 1; 1973 } 1974 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 1975 if (err < 0) 1976 return err; 1977 } 1978 _skip1: 1979 if (csubstream) { 1980 runtime = csubstream->runtime; 1981 if (trigger & PCM_ENABLE_INPUT) { 1982 if (runtime->oss.trigger) 1983 goto _skip2; 1984 runtime->oss.trigger = 1; 1985 runtime->start_threshold = 1; 1986 cmd = SNDRV_PCM_IOCTL_START; 1987 } else { 1988 if (!runtime->oss.trigger) 1989 goto _skip2; 1990 runtime->oss.trigger = 0; 1991 runtime->start_threshold = runtime->boundary; 1992 cmd = SNDRV_PCM_IOCTL_DROP; 1993 runtime->oss.prepare = 1; 1994 } 1995 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 1996 if (err < 0) 1997 return err; 1998 } 1999 _skip2: 2000 return 0; 2001 } 2002 2003 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2004 { 2005 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2006 int result = 0; 2007 2008 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2009 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2010 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2011 result |= PCM_ENABLE_OUTPUT; 2012 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2013 result |= PCM_ENABLE_INPUT; 2014 return result; 2015 } 2016 2017 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2018 { 2019 struct snd_pcm_substream *substream; 2020 struct snd_pcm_runtime *runtime; 2021 snd_pcm_sframes_t delay; 2022 int err; 2023 2024 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2025 if (substream == NULL) 2026 return -EINVAL; 2027 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2028 return err; 2029 runtime = substream->runtime; 2030 if (runtime->oss.params || runtime->oss.prepare) 2031 return 0; 2032 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2033 if (err == -EPIPE) 2034 delay = 0; /* hack for broken OSS applications */ 2035 else if (err < 0) 2036 return err; 2037 return snd_pcm_oss_bytes(substream, delay); 2038 } 2039 2040 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2041 { 2042 struct snd_pcm_substream *substream; 2043 struct snd_pcm_runtime *runtime; 2044 snd_pcm_sframes_t delay; 2045 int fixup; 2046 struct count_info info; 2047 int err; 2048 2049 if (_info == NULL) 2050 return -EFAULT; 2051 substream = pcm_oss_file->streams[stream]; 2052 if (substream == NULL) 2053 return -EINVAL; 2054 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2055 return err; 2056 runtime = substream->runtime; 2057 if (runtime->oss.params || runtime->oss.prepare) { 2058 memset(&info, 0, sizeof(info)); 2059 if (copy_to_user(_info, &info, sizeof(info))) 2060 return -EFAULT; 2061 return 0; 2062 } 2063 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2064 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2065 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2066 err = 0; 2067 delay = 0; 2068 fixup = 0; 2069 } else { 2070 fixup = runtime->oss.buffer_used; 2071 } 2072 } else { 2073 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2074 fixup = -runtime->oss.buffer_used; 2075 } 2076 if (err < 0) 2077 return err; 2078 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2079 if (atomic_read(&substream->mmap_count)) { 2080 snd_pcm_sframes_t n; 2081 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; 2082 if (n < 0) 2083 n += runtime->boundary; 2084 info.blocks = n / runtime->period_size; 2085 runtime->oss.prev_hw_ptr_interrupt = delay; 2086 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2087 snd_pcm_oss_simulate_fill(substream, delay); 2088 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2089 } else { 2090 delay = snd_pcm_oss_bytes(substream, delay); 2091 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2092 if (substream->oss.setup.buggyptr) 2093 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2094 else 2095 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2096 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2097 } else { 2098 delay += fixup; 2099 info.blocks = delay / runtime->oss.period_bytes; 2100 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2101 } 2102 } 2103 if (copy_to_user(_info, &info, sizeof(info))) 2104 return -EFAULT; 2105 return 0; 2106 } 2107 2108 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2109 { 2110 struct snd_pcm_substream *substream; 2111 struct snd_pcm_runtime *runtime; 2112 snd_pcm_sframes_t avail; 2113 int fixup; 2114 struct audio_buf_info info; 2115 int err; 2116 2117 if (_info == NULL) 2118 return -EFAULT; 2119 substream = pcm_oss_file->streams[stream]; 2120 if (substream == NULL) 2121 return -EINVAL; 2122 runtime = substream->runtime; 2123 2124 if (runtime->oss.params && 2125 (err = snd_pcm_oss_change_params(substream)) < 0) 2126 return err; 2127 2128 info.fragsize = runtime->oss.period_bytes; 2129 info.fragstotal = runtime->periods; 2130 if (runtime->oss.prepare) { 2131 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2132 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2133 info.fragments = runtime->oss.periods; 2134 } else { 2135 info.bytes = 0; 2136 info.fragments = 0; 2137 } 2138 } else { 2139 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2140 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2141 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2142 avail = runtime->buffer_size; 2143 err = 0; 2144 fixup = 0; 2145 } else { 2146 avail = runtime->buffer_size - avail; 2147 fixup = -runtime->oss.buffer_used; 2148 } 2149 } else { 2150 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2151 fixup = runtime->oss.buffer_used; 2152 } 2153 if (err < 0) 2154 return err; 2155 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2156 info.fragments = info.bytes / runtime->oss.period_bytes; 2157 } 2158 2159 #ifdef OSS_DEBUG 2160 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); 2161 #endif 2162 if (copy_to_user(_info, &info, sizeof(info))) 2163 return -EFAULT; 2164 return 0; 2165 } 2166 2167 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2168 { 2169 // it won't be probably implemented 2170 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 2171 return -EINVAL; 2172 } 2173 2174 static const char *strip_task_path(const char *path) 2175 { 2176 const char *ptr, *ptrl = NULL; 2177 for (ptr = path; *ptr; ptr++) { 2178 if (*ptr == '/') 2179 ptrl = ptr + 1; 2180 } 2181 return ptrl; 2182 } 2183 2184 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2185 const char *task_name, 2186 struct snd_pcm_oss_setup *rsetup) 2187 { 2188 struct snd_pcm_oss_setup *setup; 2189 2190 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2191 do { 2192 for (setup = pcm->streams[stream].oss.setup_list; setup; 2193 setup = setup->next) { 2194 if (!strcmp(setup->task_name, task_name)) 2195 goto out; 2196 } 2197 } while ((task_name = strip_task_path(task_name)) != NULL); 2198 out: 2199 if (setup) 2200 *rsetup = *setup; 2201 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2202 } 2203 2204 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2205 { 2206 struct snd_pcm_runtime *runtime; 2207 runtime = substream->runtime; 2208 vfree(runtime->oss.buffer); 2209 runtime->oss.buffer = NULL; 2210 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2211 snd_pcm_oss_plugin_clear(substream); 2212 #endif 2213 substream->oss.oss = 0; 2214 } 2215 2216 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2217 struct snd_pcm_oss_setup *setup, 2218 int minor) 2219 { 2220 struct snd_pcm_runtime *runtime; 2221 2222 substream->oss.oss = 1; 2223 substream->oss.setup = *setup; 2224 if (setup->nonblock) 2225 substream->f_flags |= O_NONBLOCK; 2226 else if (setup->block) 2227 substream->f_flags &= ~O_NONBLOCK; 2228 runtime = substream->runtime; 2229 runtime->oss.params = 1; 2230 runtime->oss.trigger = 1; 2231 runtime->oss.rate = 8000; 2232 mutex_init(&runtime->oss.params_lock); 2233 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2234 case SNDRV_MINOR_OSS_PCM_8: 2235 runtime->oss.format = AFMT_U8; 2236 break; 2237 case SNDRV_MINOR_OSS_PCM_16: 2238 runtime->oss.format = AFMT_S16_LE; 2239 break; 2240 default: 2241 runtime->oss.format = AFMT_MU_LAW; 2242 } 2243 runtime->oss.channels = 1; 2244 runtime->oss.fragshift = 0; 2245 runtime->oss.maxfrags = 0; 2246 runtime->oss.subdivision = 0; 2247 substream->pcm_release = snd_pcm_oss_release_substream; 2248 } 2249 2250 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2251 { 2252 int cidx; 2253 snd_assert(pcm_oss_file != NULL, return -ENXIO); 2254 for (cidx = 0; cidx < 2; ++cidx) { 2255 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2256 if (substream) 2257 snd_pcm_release_substream(substream); 2258 } 2259 kfree(pcm_oss_file); 2260 return 0; 2261 } 2262 2263 static int snd_pcm_oss_open_file(struct file *file, 2264 struct snd_pcm *pcm, 2265 struct snd_pcm_oss_file **rpcm_oss_file, 2266 int minor, 2267 struct snd_pcm_oss_setup *setup) 2268 { 2269 int idx, err; 2270 struct snd_pcm_oss_file *pcm_oss_file; 2271 struct snd_pcm_substream *substream; 2272 unsigned int f_mode = file->f_mode; 2273 2274 snd_assert(rpcm_oss_file != NULL, return -EINVAL); 2275 *rpcm_oss_file = NULL; 2276 2277 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2278 if (pcm_oss_file == NULL) 2279 return -ENOMEM; 2280 2281 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2282 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2283 f_mode = FMODE_WRITE; 2284 2285 file->f_flags &= ~O_APPEND; 2286 for (idx = 0; idx < 2; idx++) { 2287 if (setup[idx].disable) 2288 continue; 2289 if (! pcm->streams[idx].substream_count) 2290 continue; /* no matching substream */ 2291 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2292 if (! (f_mode & FMODE_WRITE)) 2293 continue; 2294 } else { 2295 if (! (f_mode & FMODE_READ)) 2296 continue; 2297 } 2298 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2299 if (err < 0) { 2300 snd_pcm_oss_release_file(pcm_oss_file); 2301 return err; 2302 } 2303 2304 pcm_oss_file->streams[idx] = substream; 2305 substream->file = pcm_oss_file; 2306 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2307 } 2308 2309 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2310 snd_pcm_oss_release_file(pcm_oss_file); 2311 return -EINVAL; 2312 } 2313 2314 file->private_data = pcm_oss_file; 2315 *rpcm_oss_file = pcm_oss_file; 2316 return 0; 2317 } 2318 2319 2320 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2321 { 2322 unsigned int idx; 2323 2324 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL); 2325 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2326 name[idx] = task->comm[idx]; 2327 name[idx] = '\0'; 2328 return 0; 2329 } 2330 2331 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2332 { 2333 int err; 2334 char task_name[32]; 2335 struct snd_pcm *pcm; 2336 struct snd_pcm_oss_file *pcm_oss_file; 2337 struct snd_pcm_oss_setup setup[2]; 2338 int nonblock; 2339 wait_queue_t wait; 2340 2341 pcm = snd_lookup_oss_minor_data(iminor(inode), 2342 SNDRV_OSS_DEVICE_TYPE_PCM); 2343 if (pcm == NULL) { 2344 err = -ENODEV; 2345 goto __error1; 2346 } 2347 err = snd_card_file_add(pcm->card, file); 2348 if (err < 0) 2349 goto __error1; 2350 if (!try_module_get(pcm->card->module)) { 2351 err = -EFAULT; 2352 goto __error2; 2353 } 2354 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2355 err = -EFAULT; 2356 goto __error; 2357 } 2358 memset(setup, 0, sizeof(setup)); 2359 if (file->f_mode & FMODE_WRITE) 2360 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2361 task_name, &setup[0]); 2362 if (file->f_mode & FMODE_READ) 2363 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2364 task_name, &setup[1]); 2365 2366 nonblock = !!(file->f_flags & O_NONBLOCK); 2367 if (!nonblock) 2368 nonblock = nonblock_open; 2369 2370 init_waitqueue_entry(&wait, current); 2371 add_wait_queue(&pcm->open_wait, &wait); 2372 mutex_lock(&pcm->open_mutex); 2373 while (1) { 2374 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2375 iminor(inode), setup); 2376 if (err >= 0) 2377 break; 2378 if (err == -EAGAIN) { 2379 if (nonblock) { 2380 err = -EBUSY; 2381 break; 2382 } 2383 } else 2384 break; 2385 set_current_state(TASK_INTERRUPTIBLE); 2386 mutex_unlock(&pcm->open_mutex); 2387 schedule(); 2388 mutex_lock(&pcm->open_mutex); 2389 if (signal_pending(current)) { 2390 err = -ERESTARTSYS; 2391 break; 2392 } 2393 } 2394 remove_wait_queue(&pcm->open_wait, &wait); 2395 mutex_unlock(&pcm->open_mutex); 2396 if (err < 0) 2397 goto __error; 2398 return err; 2399 2400 __error: 2401 module_put(pcm->card->module); 2402 __error2: 2403 snd_card_file_remove(pcm->card, file); 2404 __error1: 2405 return err; 2406 } 2407 2408 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2409 { 2410 struct snd_pcm *pcm; 2411 struct snd_pcm_substream *substream; 2412 struct snd_pcm_oss_file *pcm_oss_file; 2413 2414 pcm_oss_file = file->private_data; 2415 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2416 if (substream == NULL) 2417 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2418 snd_assert(substream != NULL, return -ENXIO); 2419 pcm = substream->pcm; 2420 if (!pcm->card->shutdown) 2421 snd_pcm_oss_sync(pcm_oss_file); 2422 mutex_lock(&pcm->open_mutex); 2423 snd_pcm_oss_release_file(pcm_oss_file); 2424 mutex_unlock(&pcm->open_mutex); 2425 wake_up(&pcm->open_wait); 2426 module_put(pcm->card->module); 2427 snd_card_file_remove(pcm->card, file); 2428 return 0; 2429 } 2430 2431 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2432 { 2433 struct snd_pcm_oss_file *pcm_oss_file; 2434 int __user *p = (int __user *)arg; 2435 int res; 2436 2437 pcm_oss_file = file->private_data; 2438 if (cmd == OSS_GETVERSION) 2439 return put_user(SNDRV_OSS_VERSION, p); 2440 if (cmd == OSS_ALSAEMULVER) 2441 return put_user(1, p); 2442 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2443 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2444 struct snd_pcm_substream *substream; 2445 int idx; 2446 for (idx = 0; idx < 2; ++idx) { 2447 substream = pcm_oss_file->streams[idx]; 2448 if (substream != NULL) 2449 break; 2450 } 2451 snd_assert(substream != NULL, return -ENXIO); 2452 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2453 } 2454 #endif 2455 if (((cmd >> 8) & 0xff) != 'P') 2456 return -EINVAL; 2457 #ifdef OSS_DEBUG 2458 printk("pcm_oss: ioctl = 0x%x\n", cmd); 2459 #endif 2460 switch (cmd) { 2461 case SNDCTL_DSP_RESET: 2462 return snd_pcm_oss_reset(pcm_oss_file); 2463 case SNDCTL_DSP_SYNC: 2464 return snd_pcm_oss_sync(pcm_oss_file); 2465 case SNDCTL_DSP_SPEED: 2466 if (get_user(res, p)) 2467 return -EFAULT; 2468 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2469 return res; 2470 return put_user(res, p); 2471 case SOUND_PCM_READ_RATE: 2472 res = snd_pcm_oss_get_rate(pcm_oss_file); 2473 if (res < 0) 2474 return res; 2475 return put_user(res, p); 2476 case SNDCTL_DSP_STEREO: 2477 if (get_user(res, p)) 2478 return -EFAULT; 2479 res = res > 0 ? 2 : 1; 2480 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2481 return res; 2482 return put_user(--res, p); 2483 case SNDCTL_DSP_GETBLKSIZE: 2484 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2485 if (res < 0) 2486 return res; 2487 return put_user(res, p); 2488 case SNDCTL_DSP_SETFMT: 2489 if (get_user(res, p)) 2490 return -EFAULT; 2491 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2492 if (res < 0) 2493 return res; 2494 return put_user(res, p); 2495 case SOUND_PCM_READ_BITS: 2496 res = snd_pcm_oss_get_format(pcm_oss_file); 2497 if (res < 0) 2498 return res; 2499 return put_user(res, p); 2500 case SNDCTL_DSP_CHANNELS: 2501 if (get_user(res, p)) 2502 return -EFAULT; 2503 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2504 if (res < 0) 2505 return res; 2506 return put_user(res, p); 2507 case SOUND_PCM_READ_CHANNELS: 2508 res = snd_pcm_oss_get_channels(pcm_oss_file); 2509 if (res < 0) 2510 return res; 2511 return put_user(res, p); 2512 case SOUND_PCM_WRITE_FILTER: 2513 case SOUND_PCM_READ_FILTER: 2514 return -EIO; 2515 case SNDCTL_DSP_POST: 2516 return snd_pcm_oss_post(pcm_oss_file); 2517 case SNDCTL_DSP_SUBDIVIDE: 2518 if (get_user(res, p)) 2519 return -EFAULT; 2520 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2521 if (res < 0) 2522 return res; 2523 return put_user(res, p); 2524 case SNDCTL_DSP_SETFRAGMENT: 2525 if (get_user(res, p)) 2526 return -EFAULT; 2527 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2528 case SNDCTL_DSP_GETFMTS: 2529 res = snd_pcm_oss_get_formats(pcm_oss_file); 2530 if (res < 0) 2531 return res; 2532 return put_user(res, p); 2533 case SNDCTL_DSP_GETOSPACE: 2534 case SNDCTL_DSP_GETISPACE: 2535 return snd_pcm_oss_get_space(pcm_oss_file, 2536 cmd == SNDCTL_DSP_GETISPACE ? 2537 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2538 (struct audio_buf_info __user *) arg); 2539 case SNDCTL_DSP_NONBLOCK: 2540 return snd_pcm_oss_nonblock(file); 2541 case SNDCTL_DSP_GETCAPS: 2542 res = snd_pcm_oss_get_caps(pcm_oss_file); 2543 if (res < 0) 2544 return res; 2545 return put_user(res, p); 2546 case SNDCTL_DSP_GETTRIGGER: 2547 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2548 if (res < 0) 2549 return res; 2550 return put_user(res, p); 2551 case SNDCTL_DSP_SETTRIGGER: 2552 if (get_user(res, p)) 2553 return -EFAULT; 2554 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2555 case SNDCTL_DSP_GETIPTR: 2556 case SNDCTL_DSP_GETOPTR: 2557 return snd_pcm_oss_get_ptr(pcm_oss_file, 2558 cmd == SNDCTL_DSP_GETIPTR ? 2559 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2560 (struct count_info __user *) arg); 2561 case SNDCTL_DSP_MAPINBUF: 2562 case SNDCTL_DSP_MAPOUTBUF: 2563 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2564 cmd == SNDCTL_DSP_MAPINBUF ? 2565 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2566 (struct buffmem_desc __user *) arg); 2567 case SNDCTL_DSP_SETSYNCRO: 2568 /* stop DMA now.. */ 2569 return 0; 2570 case SNDCTL_DSP_SETDUPLEX: 2571 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2572 return 0; 2573 return -EIO; 2574 case SNDCTL_DSP_GETODELAY: 2575 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2576 if (res < 0) { 2577 /* it's for sure, some broken apps don't check for error codes */ 2578 put_user(0, p); 2579 return res; 2580 } 2581 return put_user(res, p); 2582 case SNDCTL_DSP_PROFILE: 2583 return 0; /* silently ignore */ 2584 default: 2585 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2586 } 2587 return -EINVAL; 2588 } 2589 2590 #ifdef CONFIG_COMPAT 2591 /* all compatible */ 2592 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2593 #else 2594 #define snd_pcm_oss_ioctl_compat NULL 2595 #endif 2596 2597 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2598 { 2599 struct snd_pcm_oss_file *pcm_oss_file; 2600 struct snd_pcm_substream *substream; 2601 2602 pcm_oss_file = file->private_data; 2603 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2604 if (substream == NULL) 2605 return -ENXIO; 2606 substream->f_flags = file->f_flags & O_NONBLOCK; 2607 #ifndef OSS_DEBUG 2608 return snd_pcm_oss_read1(substream, buf, count); 2609 #else 2610 { 2611 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2612 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); 2613 return res; 2614 } 2615 #endif 2616 } 2617 2618 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2619 { 2620 struct snd_pcm_oss_file *pcm_oss_file; 2621 struct snd_pcm_substream *substream; 2622 long result; 2623 2624 pcm_oss_file = file->private_data; 2625 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2626 if (substream == NULL) 2627 return -ENXIO; 2628 substream->f_flags = file->f_flags & O_NONBLOCK; 2629 result = snd_pcm_oss_write1(substream, buf, count); 2630 #ifdef OSS_DEBUG 2631 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); 2632 #endif 2633 return result; 2634 } 2635 2636 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2637 { 2638 struct snd_pcm_runtime *runtime = substream->runtime; 2639 if (atomic_read(&substream->mmap_count)) 2640 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2641 else 2642 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; 2643 } 2644 2645 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2646 { 2647 struct snd_pcm_runtime *runtime = substream->runtime; 2648 if (atomic_read(&substream->mmap_count)) 2649 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2650 else 2651 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; 2652 } 2653 2654 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2655 { 2656 struct snd_pcm_oss_file *pcm_oss_file; 2657 unsigned int mask; 2658 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2659 2660 pcm_oss_file = file->private_data; 2661 2662 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2663 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2664 2665 mask = 0; 2666 if (psubstream != NULL) { 2667 struct snd_pcm_runtime *runtime = psubstream->runtime; 2668 poll_wait(file, &runtime->sleep, wait); 2669 snd_pcm_stream_lock_irq(psubstream); 2670 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2671 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2672 snd_pcm_oss_playback_ready(psubstream))) 2673 mask |= POLLOUT | POLLWRNORM; 2674 snd_pcm_stream_unlock_irq(psubstream); 2675 } 2676 if (csubstream != NULL) { 2677 struct snd_pcm_runtime *runtime = csubstream->runtime; 2678 snd_pcm_state_t ostate; 2679 poll_wait(file, &runtime->sleep, wait); 2680 snd_pcm_stream_lock_irq(csubstream); 2681 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2682 snd_pcm_oss_capture_ready(csubstream)) 2683 mask |= POLLIN | POLLRDNORM; 2684 snd_pcm_stream_unlock_irq(csubstream); 2685 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2686 struct snd_pcm_oss_file ofile; 2687 memset(&ofile, 0, sizeof(ofile)); 2688 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2689 runtime->oss.trigger = 0; 2690 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2691 } 2692 } 2693 2694 return mask; 2695 } 2696 2697 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2698 { 2699 struct snd_pcm_oss_file *pcm_oss_file; 2700 struct snd_pcm_substream *substream = NULL; 2701 struct snd_pcm_runtime *runtime; 2702 int err; 2703 2704 #ifdef OSS_DEBUG 2705 printk("pcm_oss: mmap begin\n"); 2706 #endif 2707 pcm_oss_file = file->private_data; 2708 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2709 case VM_READ | VM_WRITE: 2710 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2711 if (substream) 2712 break; 2713 /* Fall through */ 2714 case VM_READ: 2715 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2716 break; 2717 case VM_WRITE: 2718 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2719 break; 2720 default: 2721 return -EINVAL; 2722 } 2723 /* set VM_READ access as well to fix memset() routines that do 2724 reads before writes (to improve performance) */ 2725 area->vm_flags |= VM_READ; 2726 if (substream == NULL) 2727 return -ENXIO; 2728 runtime = substream->runtime; 2729 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2730 return -EIO; 2731 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2732 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2733 else 2734 return -EIO; 2735 2736 if (runtime->oss.params) { 2737 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2738 return err; 2739 } 2740 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2741 if (runtime->oss.plugin_first != NULL) 2742 return -EIO; 2743 #endif 2744 2745 if (area->vm_pgoff != 0) 2746 return -EINVAL; 2747 2748 err = snd_pcm_mmap_data(substream, file, area); 2749 if (err < 0) 2750 return err; 2751 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2752 runtime->silence_threshold = 0; 2753 runtime->silence_size = 0; 2754 #ifdef OSS_DEBUG 2755 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); 2756 #endif 2757 /* In mmap mode we never stop */ 2758 runtime->stop_threshold = runtime->boundary; 2759 2760 return 0; 2761 } 2762 2763 #ifdef CONFIG_SND_VERBOSE_PROCFS 2764 /* 2765 * /proc interface 2766 */ 2767 2768 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2769 struct snd_info_buffer *buffer) 2770 { 2771 struct snd_pcm_str *pstr = entry->private_data; 2772 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2773 mutex_lock(&pstr->oss.setup_mutex); 2774 while (setup) { 2775 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2776 setup->task_name, 2777 setup->periods, 2778 setup->period_size, 2779 setup->disable ? " disable" : "", 2780 setup->direct ? " direct" : "", 2781 setup->block ? " block" : "", 2782 setup->nonblock ? " non-block" : "", 2783 setup->partialfrag ? " partial-frag" : "", 2784 setup->nosilence ? " no-silence" : ""); 2785 setup = setup->next; 2786 } 2787 mutex_unlock(&pstr->oss.setup_mutex); 2788 } 2789 2790 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2791 { 2792 struct snd_pcm_oss_setup *setup, *setupn; 2793 2794 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2795 setup; setup = setupn) { 2796 setupn = setup->next; 2797 kfree(setup->task_name); 2798 kfree(setup); 2799 } 2800 pstr->oss.setup_list = NULL; 2801 } 2802 2803 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2804 struct snd_info_buffer *buffer) 2805 { 2806 struct snd_pcm_str *pstr = entry->private_data; 2807 char line[128], str[32], task_name[32], *ptr; 2808 int idx1; 2809 struct snd_pcm_oss_setup *setup, *setup1, template; 2810 2811 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2812 mutex_lock(&pstr->oss.setup_mutex); 2813 memset(&template, 0, sizeof(template)); 2814 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2815 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2816 snd_pcm_oss_proc_free_setup_list(pstr); 2817 mutex_unlock(&pstr->oss.setup_mutex); 2818 continue; 2819 } 2820 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2821 if (!strcmp(setup->task_name, task_name)) { 2822 template = *setup; 2823 break; 2824 } 2825 } 2826 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2827 template.periods = simple_strtoul(str, NULL, 10); 2828 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2829 template.period_size = simple_strtoul(str, NULL, 10); 2830 for (idx1 = 31; idx1 >= 0; idx1--) 2831 if (template.period_size & (1 << idx1)) 2832 break; 2833 for (idx1--; idx1 >= 0; idx1--) 2834 template.period_size &= ~(1 << idx1); 2835 do { 2836 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2837 if (!strcmp(str, "disable")) { 2838 template.disable = 1; 2839 } else if (!strcmp(str, "direct")) { 2840 template.direct = 1; 2841 } else if (!strcmp(str, "block")) { 2842 template.block = 1; 2843 } else if (!strcmp(str, "non-block")) { 2844 template.nonblock = 1; 2845 } else if (!strcmp(str, "partial-frag")) { 2846 template.partialfrag = 1; 2847 } else if (!strcmp(str, "no-silence")) { 2848 template.nosilence = 1; 2849 } else if (!strcmp(str, "buggy-ptr")) { 2850 template.buggyptr = 1; 2851 } 2852 } while (*str); 2853 if (setup == NULL) { 2854 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2855 if (! setup) { 2856 buffer->error = -ENOMEM; 2857 mutex_lock(&pstr->oss.setup_mutex); 2858 return; 2859 } 2860 if (pstr->oss.setup_list == NULL) 2861 pstr->oss.setup_list = setup; 2862 else { 2863 for (setup1 = pstr->oss.setup_list; 2864 setup1->next; setup1 = setup1->next); 2865 setup1->next = setup; 2866 } 2867 template.task_name = kstrdup(task_name, GFP_KERNEL); 2868 if (! template.task_name) { 2869 kfree(setup); 2870 buffer->error = -ENOMEM; 2871 mutex_lock(&pstr->oss.setup_mutex); 2872 return; 2873 } 2874 } 2875 *setup = template; 2876 mutex_unlock(&pstr->oss.setup_mutex); 2877 } 2878 } 2879 2880 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2881 { 2882 int stream; 2883 for (stream = 0; stream < 2; ++stream) { 2884 struct snd_info_entry *entry; 2885 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2886 if (pstr->substream_count == 0) 2887 continue; 2888 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2889 entry->content = SNDRV_INFO_CONTENT_TEXT; 2890 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2891 entry->c.text.read = snd_pcm_oss_proc_read; 2892 entry->c.text.write = snd_pcm_oss_proc_write; 2893 entry->private_data = pstr; 2894 if (snd_info_register(entry) < 0) { 2895 snd_info_free_entry(entry); 2896 entry = NULL; 2897 } 2898 } 2899 pstr->oss.proc_entry = entry; 2900 } 2901 } 2902 2903 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2904 { 2905 int stream; 2906 for (stream = 0; stream < 2; ++stream) { 2907 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2908 snd_info_free_entry(pstr->oss.proc_entry); 2909 pstr->oss.proc_entry = NULL; 2910 snd_pcm_oss_proc_free_setup_list(pstr); 2911 } 2912 } 2913 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2914 #define snd_pcm_oss_proc_init(pcm) 2915 #define snd_pcm_oss_proc_done(pcm) 2916 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2917 2918 /* 2919 * ENTRY functions 2920 */ 2921 2922 static const struct file_operations snd_pcm_oss_f_reg = 2923 { 2924 .owner = THIS_MODULE, 2925 .read = snd_pcm_oss_read, 2926 .write = snd_pcm_oss_write, 2927 .open = snd_pcm_oss_open, 2928 .release = snd_pcm_oss_release, 2929 .poll = snd_pcm_oss_poll, 2930 .unlocked_ioctl = snd_pcm_oss_ioctl, 2931 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2932 .mmap = snd_pcm_oss_mmap, 2933 }; 2934 2935 static void register_oss_dsp(struct snd_pcm *pcm, int index) 2936 { 2937 char name[128]; 2938 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2939 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2940 pcm->card, index, &snd_pcm_oss_f_reg, 2941 pcm, name) < 0) { 2942 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 2943 pcm->card->number, pcm->device); 2944 } 2945 } 2946 2947 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 2948 { 2949 pcm->oss.reg = 0; 2950 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2951 char name[128]; 2952 int duplex; 2953 register_oss_dsp(pcm, 0); 2954 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2955 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2956 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2957 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2958 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2959 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2960 pcm->card->number, 2961 name); 2962 #endif 2963 pcm->oss.reg++; 2964 pcm->oss.reg_mask |= 1; 2965 } 2966 if (adsp_map[pcm->card->number] == (int)pcm->device) { 2967 register_oss_dsp(pcm, 1); 2968 pcm->oss.reg++; 2969 pcm->oss.reg_mask |= 2; 2970 } 2971 2972 if (pcm->oss.reg) 2973 snd_pcm_oss_proc_init(pcm); 2974 2975 return 0; 2976 } 2977 2978 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 2979 { 2980 if (pcm->oss.reg) { 2981 if (pcm->oss.reg_mask & 1) { 2982 pcm->oss.reg_mask &= ~1; 2983 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2984 pcm->card, 0); 2985 } 2986 if (pcm->oss.reg_mask & 2) { 2987 pcm->oss.reg_mask &= ~2; 2988 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2989 pcm->card, 1); 2990 } 2991 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2992 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2993 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 2994 #endif 2995 } 2996 pcm->oss.reg = 0; 2997 } 2998 return 0; 2999 } 3000 3001 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3002 { 3003 snd_pcm_oss_disconnect_minor(pcm); 3004 snd_pcm_oss_proc_done(pcm); 3005 return 0; 3006 } 3007 3008 static struct snd_pcm_notify snd_pcm_oss_notify = 3009 { 3010 .n_register = snd_pcm_oss_register_minor, 3011 .n_disconnect = snd_pcm_oss_disconnect_minor, 3012 .n_unregister = snd_pcm_oss_unregister_minor, 3013 }; 3014 3015 static int __init alsa_pcm_oss_init(void) 3016 { 3017 int i; 3018 int err; 3019 3020 /* check device map table */ 3021 for (i = 0; i < SNDRV_CARDS; i++) { 3022 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3023 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 3024 i, dsp_map[i]); 3025 dsp_map[i] = 0; 3026 } 3027 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3028 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 3029 i, adsp_map[i]); 3030 adsp_map[i] = 1; 3031 } 3032 } 3033 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3034 return err; 3035 return 0; 3036 } 3037 3038 static void __exit alsa_pcm_oss_exit(void) 3039 { 3040 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3041 } 3042 3043 module_init(alsa_pcm_oss_init) 3044 module_exit(alsa_pcm_oss_exit) 3045